running remote bash script from local linux host and issue with "echo command not working

Question

I have a bash script that I'm trying to run remotely from another system. It is to add a cronjob to a user on the remote system.

I run this from the local system.

ssh root@remote_system 'bash -s < /home/user_name/test2.sh' 

this is the script on the remote system that gets run.

#!/bin/bash set -x #valhost=$(hostname) if [ -d /home/user/junk ] then touch /var/spool/cron/user_name crontab -l -u user_name > /home/user_name/mycron chmod +x /home/user_name/mycron echo "0 0 * * * /bin/find /home/user_name \( -name '*' \) -mtime +45 -delete" >> /home/user_name/mycron crontab -u user_name /home/user_name/mycron elif [ -d /home/user_name/tmp ] then touch /var/spool/cron/user_name crontab -l -u user_name > /home/user_name/mycron chmod +x /home/user_name/mycron echo "0 0 * * * /bin/find /home/user_name \( -name '*' \) -mtime +60 -delete" >> mycron crontab -u user_name /home/user_name/mycron else echo "directory does not exist on" $HOSTNAME > /home/user_name/jbossjunk fi 

It checks to see if a directory is there and then puts a specific entry in the crontab. The script works fine when I run it on the actual remote system. But when I run it on the local the echo doesn't output to the "mycron" file. I've searched a lot of places and found nothing on the syntax I could use. I've tried numerous variations of syntax on the line and come up with bad results. Can someone give me the syntax that would work for this "echo" line running the script remotely

Answer 1

Try using tee. Since tee handles output differently than echo.

if [ -d /home/user/junk ] then touch /var/spool/cron/user_name crontab -l -u user_name > /home/user_name/mycron chmod +x /home/user_name/mycron tee /home/user_name/mycron <<-EOF &>/dev/null 0 0 * * * /bin/find /home/user_name \( -name '*' \) -mtime +45 -delete EOF crontab -u user_name /home/user_name/mycron elif 

This example is reading in the heredoc into the file specified by tee. The &>/dev/null sends the STDOUT and STDERR from the tee command to /dev/null, but doesn't affect tee writing to the specified file.

Answer 2

You have seven statements referencing /home/user_name/mycron (and, by the way, I assume that that is /home/user_name/mycron, and not literally u s e r _ n a m e) and one that references just plain mycron (i.e., a relative pathname instead of an absolute one).  If you run the script from/home/user_name, they’re equivalent.  If you run the script from /root, then the echo statement writes to /root/mycron.

P.S. You absolutely do not need to do chmod +x /home/user_name/mycron.